Template:BuildingsNavbox/styles.css

.mw-collapsible span.mw-collapsible-toggle {
    float:left;
    margin-left:0;
    margin-right:1em;
    color:red;
}

.mw-collapsible-toggle { 
    color:purple;
    float:left;
    margin-left:0;
    margin-right:1em;

}